package com.base.dehong.util;
	/* @author YeFengyun
	 * 文 件 名:  DataCleanManager.java   
	 * * 描    述:  主要功能有清除内/外缓存，清除数据库，清除sharedPreference，清除files和清除自定义目录   
	 * */  
	import java.io.File;  
import java.math.BigDecimal;  
	  
import android.annotation.SuppressLint;
	import android.content.Context;  
import android.os.Environment;  
import android.text.TextUtils;  
	  
	/** * 本应用数据清除管理器 */  
	public class DataCleanManager {  
	    /** 
	     * * 清除本应用内部缓存(/data/data/com.xxx.xxx/cache) * * 
	     *  
	     * @param context 
	     */  
	    public static void cleanInternalCache(Context context) {  
	        deleteFilesByDirectory(context.getCacheDir());  
	    }  
	  
	    /** 
	     * * 清除本应用所有数据库(/data/data/com.xxx.xxx/databases) * * 
	     *  
	     * @param context 
	     */  
	    @SuppressLint("SdCardPath")
		public static void cleanDatabases(Context context) {  
	        deleteFilesByDirectory(new File("/data/data/"  
	                + context.getPackageName() + "/databases"));  
	    }  
	  
	    /** 
	     * * 清除本应用SharedPreference(/data/data/com.xxx.xxx/shared_prefs) * 
	     *  
	     * @param context 
	     */  
	    @SuppressLint("SdCardPath")
		public static void cleanSharedPreference(Context context) {  
	        deleteFilesByDirectory(new File("/data/data/" + context.getPackageName() + "/shared_prefs"));  
	    }  
	  
	    /** 
	     * * 按名字清除本应用数据库 * * 
	     *  
	     * @param context 
	     * @param dbName 
	     */  
	    public static void cleanDatabaseByName(Context context, String dbName) {  
	        context.deleteDatabase(dbName);  
	    }  
	  
	    /** 
	     * * 清除/data/data/com.xxx.xxx/files下的内容 * * 
	     *  
	     * @param context 
	     */  
	    public static void cleanFiles(Context context) {  
	        deleteFilesByDirectory(context.getFilesDir());  
	    }  
	  
	    /** 
	     * * 清除外部cache下的内容(/mnt/sdcard/android/data/com.xxx.xxx/cache) 
	     *  
	     * @param context 
	     */  
	    public static void cleanExternalCache(Context context) {  
	        if (Environment.getExternalStorageState().equals(  
	                Environment.MEDIA_MOUNTED)) {  
	            deleteFilesByDirectory(context.getExternalCacheDir());  
	        }  
	    }  
	    /** 
	     * * 清除自定义路径下的文件，使用需小心，请不要误删。而且只支持目录下的文件删除 * * 
	     *  
	     * @param filePath 
	     * */  
	    public static void cleanCustomCache(String filePath) {  
	        deleteFilesByDirectory(new File(filePath));  
	    }  
	  
	    /** 
	     * * 清除本应用所有的数据 * * 
	     *  
	     * @param context 
	     * @param filepath 
	     */  
	    public static void cleanApplicationData(Context context, String... filepath) {  
	        cleanInternalCache(context);  
	        cleanExternalCache(context);  
	        cleanDatabases(context);  
	        cleanSharedPreference(context);  
	        cleanFiles(context);  
	        if (filepath == null) {  
	            return;  
	        }  
	        for (String filePath : filepath) {  
	            cleanCustomCache(filePath);  
	        }  
	    }  
	  
	    /** 
	     * * 删除方法 这里只会删除某个文件夹下的文件 
	     *  
	     * @param directory 
	     */  
	    private static boolean  deleteFilesByDirectory(File dir) {  
	    	if (dir != null && dir.isDirectory()) 
	    	{
	    		String[] children = dir.list();
	    		for (int i = 0; i < children.length; i++) 
	    		{
	    			boolean success = deleteFilesByDirectory(new File(dir, children[i]));
	    			if (!success) 
	    			{
	    				return false;
	    			}
	    		}
	    	}
	    	return dir.delete();
	    }  
	      
	    /*
	     *  获取文件大小
	     *  Context.getExternalFilesDir() --> SDCard/Android/data/你的应用的包名/files/ 目录，一般放一些长时间保存的数据  
	    //Context.getExternalCacheDir() --> SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据  
	     */
	    public static long getFolderSize(File file) throws Exception {  
	        long size = 0;  
	        try {  
	            File[] fileList = file.listFiles();  
	            for (int i = 0; i < fileList.length; i++) {  
	                // 如果下面还有文件  
	                if (fileList[i].isDirectory()) {  
	                    size = size + getFolderSize(fileList[i]);  
	                } else {  
	                    size = size + fileList[i].length();  
	                }  
	            }  
	        } catch (Exception e) {  
	            e.printStackTrace();  
	        }  
	        return size;  
	    }  
	      
	    /** 
	     * 删除指定目录下文件及目录 
	     *  
	     * @param deleteThisPath 
	     * @param filepath 
	     * @return 
	     */  
	    public static void deleteFolderFile(String filePath, boolean deleteThisPath) {  
	        if (!TextUtils.isEmpty(filePath)) {  
	            try {  
	                File file = new File(filePath);  
	                if (file.isDirectory()) {// 如果下面还有文件  
	                    File files[] = file.listFiles();  
	                    for (int i = 0; i < files.length; i++) {  
	                        deleteFolderFile(files[i].getAbsolutePath(), true);  
	                    }  
	                }  
	                if (deleteThisPath) {  
	                    if (!file.isDirectory()) {// 如果是文件，删除  
	                        file.delete();  
	                    } else {// 目录  
	                        if (file.listFiles().length == 0) {// 目录下没有文件或者目录，删除  
	                            file.delete();  
	                        }  
	                    }  
	                }  
	            } catch (Exception e) {  
	                // TODO Auto-generated catch block  
	                e.printStackTrace();  
	            }  
	        }  
	    }  
	      
	    /** 
	     * 格式化单位 
	     *  
	     * @param size 
	     * @return 
	     */  
	    public static String getFormatSize(double size) {  
	        double kiloByte = size / 1024;  
	        if (kiloByte < 1) {  
	            return size + "Byte";  
	        }  
	  
	        double megaByte = kiloByte / 1024;  
	        if (megaByte < 1) {  
	            BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));  
	            return result1.setScale(2, BigDecimal.ROUND_HALF_UP)  
	                    .toPlainString() + "KB";  
	        }  
	  
	        double gigaByte = megaByte / 1024;  
	        if (gigaByte < 1) {  
	            BigDecimal result2 = new BigDecimal(Double.toString(megaByte));  
	            return result2.setScale(2, BigDecimal.ROUND_HALF_UP)  
	                    .toPlainString() + "MB";  
	        }  
	  
	        double teraBytes = gigaByte / 1024;  
	        if (teraBytes < 1) {  
	            BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));  
	            return result3.setScale(2, BigDecimal.ROUND_HALF_UP)  
	                    .toPlainString() + "GB";  
	        }  
	        BigDecimal result4 = new BigDecimal(teraBytes);  
	        return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()  
	                + "TB";  
	    }  
	      
	    /*
	     * 获取缓存大小
	     */
	    public static String getCacheSize(File file) throws Exception {  
	        return getFormatSize(getFolderSize(file));  
	    }  
	      
}
